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1、function t=TimetoJD(Y,M,D,h,f,s)if(Y=80) Y=Y+1900;else Y=Y+2000;endif M=2 Y=Y-1; M=M+12;endJD=fix(365.25*Y)+fix(30.6001*(M+1)+D+h/24+f/1440+s/24/3600+1720981.5;t=JD-2444244.5;function head,obs=ReadObsData%读接收机观测数据文件%HeadODat :a structure stores header information if o-file% .ApproXYZ3; /approximate
2、coordinate% .interval; /intervals of two adjacent epochs% .SiteName; /point name% .Ant_H; /antenna height% .Ant_E; /east offset of the antenna center% .Ant_N; /north offset of then antenna center% .TimeOB; /first epoch time in modifuied Julian time% .TimeOE; /last epoch time in modifuied Julian time
3、% .SumOType; /number of types of observables% .SumOOSumOType; /type of observables 0-L1,1-L2,2-C1,3-P1,4-P2,5-D1,6-D2,%ObsODat :a structure stores observables by one and one epoch% .TimeOEpp2; /reciever time of epoch% .SatSum; /number of satellites% .SatCodeSatSum; /satellites PRN% .Obs_FreL1SatSum;
4、 % .Obs_FreL2SatSum;% .Obs_RangeC1SatSum;% .Obs_RangeP1SatSum;% .Obs_RangeP2SatSum;global HeadODat;global ObsODat; fname,fpath=uigetfile(*.*,选择一个O文件); O_filename=strcat(fpath,fname); fid1=fopen(O_filename,rt); if (fid1=-1) msgbox(file invalide,warning,warn); return; end %将文件头数据存入结构体HeadODat中 t=0; wh
5、ile(t100) s=fgets(fid1); t=t+1; L=size(s,2); if L81 s(L+1:81)= ; end instrS=s(61:81); %测站点近似坐标 if strncmp(instrS,APPROX POSITION XYZ,19) HeadODat.ApproXYZ=zeros(1,3); HeadODat.ApproXYZ(1,1)=str2num(s(1:14); HeadODat.ApproXYZ(1,2)=str2num(s(15:28); HeadODat.ApproXYZ(1,3)=str2num(s(29:42); %历元间隔; else
6、if strncmp(instrS,INTERVAL,8) HeadODat.interval=str2num(s(5:11); %测站点号 elseif strncmp(instrS,MARKER NAME,11) HeadODat.SiteName=s(1:4) %天线中心改正 elseif strncmp(instrS,ANTENNA: DELTA H/E/N,20) HeadODat.Ant_H=str2num(s(1:14); HeadODat.Ant_E=str2num(s(15:28); HeadODat.Ant_N=str2num(s(29:42); %第一个历元时间 else
7、if strncmp(instrS,TIME OF FIRST OBS,17) year=str2num(s(1:6); month=str2num(s(7:12); day=str2num(s(13:18); hour=str2num(s(19:24); minute=str2num(s(25:30); second=str2num(s(31:42); HeadODat.TimeOB=TimetoJD(year,month,day,hour,minute,second); %最后一个历元时间 elseif strncmp(instrS,TIME OF LAST OBS,16) year=st
8、r2num(s(1:6); month=str2num(s(7:12); day=str2num(s(13:18); hour=str2num(s(19:24); minute=str2num(s(25:30); second=str2num(s(31:42); HeadODat.TimeOE=TimetoJD(year,month,day,hour,minute,second); %观测值类型 elseif strncmp(instrS,# / TYPES OF OBSERV,19) HeadODat.SumOType=str2num(s(1:6); HeadODat.SumOO=ones(
9、1,HeadODat.SumOType)*-1; for k=1:HeadODat.SumOType f=s(k*6+5:k*6+6); if strcmp(f,L1) HeadODat.SumOO(1,k)=0; elseif strcmp(f,L2) HeadODat.SumOO(1,k)=1; elseif strcmp(f,C1) HeadODat.SumOO(1,k)=2; elseif strcmp(f,P1) HeadODat.SumOO(1,k)=3; elseif strcmp(f,P2) HeadODat.SumOO(1,k)=4; elseif strcmp(f,D1)
10、HeadODat.SumOO(1,k)=5; elseif strcmp(f,D2) HeadODat.SumOO(1,k)=6; end end %头文件结束 elseif strncmp(instrS,END OF HEADER,13) break; else continue; end end %观测数据结构体%观测数据结构 t=0; while feof(fid1) %每个历元的第一行数据，时间和观测到的卫星号 s=fgets(fid1); t=t+1; year=str2num(s(1:3); month=str2num(s(4:6); day=str2num(s(7:9); hour=str2num(s(10:12); minute=str2num(s(13:15); second=str2num(s(16:26); %历元时间 ObsODat(t).TimeOEp=year,month,day,hour,minute,second; ObsODat(t).TimeOEpp=TimetoJD(year,month,day,hour,minute,second); %该历元观测到的卫星数 ObsODat(t).SatSum=str2num(s(30:32); %该历元观测到的卫星号 ObsODat(t).SatCode=zero
